A：Z3 can be a requirement for deep groove ball bearings, self-aligning ball bearings, tapered roller bearings, and steel ball vibration acceleration peaks. See the table below for details. In the standard, the peak values of product vibration acceleration of certain series of different series are specified, which are divided into Z, Z1, Z2, Z3 and Z4 groups. The Z group is the basic requirement for general bearing vibration (acceleration).
Deep groove ball vibration acceleration limit value
Single set of tapered roller bearings vibration acceleration limit
Steel ball vibration acceleration limit value
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